Art is purposiveness without purpose.

[Aristotle formal logic thus far (1787)] has not been able to advance a single step, and hence is to all appearances closed and completed.

Man's greatest concern is to know how he shall properly fill his place in the universe and correctly understand what he must be in order to be a man.

All perception is colored by emotion.

There is no virtue in penance and fasting which waste the body; they are only fanatical and monkish.

I have no knowledge of myself as I am, but merely as I appear to myself.

Humanity is at its greatest perfection in the race of the whites.